how to establish Communication between two stm32 board using uart.?

[NASOK.1]

I'm using two stm32 board, one is stm32wb55-dk which is main board and another is stm32c011 which acts as companion board.I need to establish communication between both using uart to send from main board to companion.

connected tx of wb to rx of c0 and vice versa

[Tesla DeLorean]

Use a common ground, switch the RX / TX over, so TX-A goes to RX-B

Standard HAL_UART_Transmit() HAL_UART_Receive() should work.

Come up with a protocol you want to use.

[Foued_KH]

Hello @NASOK.1​ ,

I recommend you follow this wiki : Getting started with UART - stm32mcu.

Foued